Thread operated stop motion in circular looms



THREAD OPERATED STOP MOTION IN C IRCULAR LOOMS Filed April V13, 194e 2sheets-sheet 1 zii 29 2 l Jg. 'sa

IN1/wrox Vidar Marie r/aseph Jan; 6, 1948.r v. M. J. ANCET `2,433,824

THREAD OPERATED STOP MOTIONv IN CIRCULR LOMS Filed April 13, 194el 2'sheets-sheet 2 Victor Narie rfasepl INM/wos.

Patented Jan. 6, 1948 UNITED STATES aiTizlvToFl-*ICE` THREAD OPERATEDSTOPMOTION IN CIRCULAR LOOMS Victor Marie Joseph Ancet, Lyon,v France,assignor to Marius Fayolle, alias Marcel Fayolle,

Lyon, France Application April 13', 1946, Serial No. 661,920

In France November 30, 1945 'z claims. (c1. 139-371) through the agencyof a mechanical or electrical system the stoppage of the loom.

The arrangement forming the object of my present invention is novelthrough the fact that the rocking member carried by the shuttle or thelike moving member is separated from the parts on which it is to actthrough a sheet of -threads adapted to move With'reference to saidshuttle;

said feature allows my invention to be more particularly adapted tocircular looms wherein the shuttle carrying the weft thread andprogressing inside the shed is separated from the members driving itthrough one of the annular sheets of warp thread, generally the innersheet.

My invention covers therefore a novel mechanism allowing sensing ordetecting, through said sheet of threads and without disturbingoperation, the dropping or rocking of the movable member carried by theshuttle.

This mechanism comprises chiey a rotary part or drum carried by theshuttle driving member and accompanying it on the outside of the shed.Said part is provided at its periphery with one or more projectingfingers-adapted to periodically engage during the rotation of said partfor sensing purposes through the sheet of threads and to sweep overacertain part of the location lof the movable member carried by theshuttle,

whereby when said movable member has fallen or rocked, the hindranceprovided thereby for the passage of said sensing finger leads to achange in the position of the latter which change is made use oi forstopping the loom.

the shuttle and held raised through its engagement against the weftthread is advantageously constituted by an arch/shaped member which isurged laterally by a spring always in the same direction, in antagonismwith the retaining action produced by the tension of the weft threadbearing on the other hand against a stationary member also constitutedby an arch shaped member located in the planeof progress of the shuttleand inside which the movable hoop may be inscribed. A

My invention willl be better understood by referring to the accompanyingdrawings illustrat- My invention also covers a particularly interestingform of execution of my invention under the form of an electrical weftstop motion or the like wherein (a) The sensing fingers or at least oneof them is carried by a pivoting axis held in position by' ing a form ofexecution thereof disclosedvmerely by way of example and by no means ina limitative sense. In said drawings: y

Fig. 1 illustrates in a diagrammatical manner and in partly sectionalelevational view a shuttle adapted to move in the plane of the drawingwith its movable member raised. v

, Fig. 2 is a view at 90 of this same movable member in its rockedposition.

Fig. 3 illustrates for the same position of the movable member the wholearrangement With its rotary sensing drum.4

Fig. 4 is a perspective view from above, the cover of the drum beingpartly torn off.

Figs. 5 and 6 are two diagrams illustrating two positions corresponding"to, normal operation and to release of the inner mechanism of the drum.

As apparent from the drawing, the movable member I which is arch-shapedis pivotally secured at 2 to the cradle 3 of the shuttle 4. It issubmitted to the action of a light spring 5 and is provided at itsperiphery with a folded portion 6. This movable member I is surroundedby a second stationary arch-shaped member 1 located in the plane ofprogress of the shuttle.

The weft thread s passing out of the shuttle be-l tween the feet of saidmembers I and 1 passes behind the arch I and in front of the arch iwhereby the tension exerted on said thread causes it to raise the arch Iinto the plane of the arch 1. On the contrary when the thread breaks oris released, the movable member I rocks under the ac-` tion of itsspring 5 and rests lying flat against the terminal surface of theshuttle carrying cradle 3.

The drum is constituted by a circular plate I0 keyed to a shaft IIadapted to pivot withreference to a plate I2 carried by an upright I3rigid with the driving member 9 of the shuttle and ac-l companying thusthe latter on the outside of the inner sheet of threads I4 forming theshed. l,The shaft II is alined with the shaft of one of the shuttledriving rollers I5 and its rotary movement is transmitted thereto bysaid roller through a driving member I6 engaged by a fork I1. One ormore projecting fingers I8, two in the case illustrated, are mounted onpivots I9 so that they may receive a radial setting with reference tothe plate I0. These fingers project sufficiently beyond samefor engagingperiodically the sheet of threads I4 by reason of the rotation of theplate I0, said fingers sweeping furthermore a .certain portion of thezone occupied by the movable member I when the latter is in its rockedposition. The length of projectionof the fingers is moreover adjustableby acting on the set-screws 20 or through any other suitable means.

The .pivot I9 for each of the sensing fingers I8 extends above the plateI and carries a hook 2 I. A spring 22 connects the hooks correspondingto the two fingers and holds them facing one another so as to suitablyangularly position the sensing fingers. Two collapsible stops 23 allowthe rotation of the pivots I9 only in one direction. while they servefor stopping said pivots at the end of their stroke in the oppositedirection and holding them against movement.

In the medial portion of the spring 22 is inserted a contact piece 24located underneath a cooperating metal contact member 25 appearing underthe shape of an upside down il carried by a removable cover 26 adaptedto completely conceal the plate I0. -This contact member 25 is insulatedwith reference to the remaining parts and is rigid with a tapered screw21 to which electric current is fed through a hollow bronze thrustmember 28 carried by thel end of a spring blade 29 carried in its turnby a small pillar 30 electrically insulated with reference to the plateI2 to which it is secured. Current is fed to said pillar through aterminal 3| while its return is operated through grounding.

The operation of this arrangement is easy to understand. As a matter offact, when the weft thread breaks, the movable member I is no longerheld in its raised position and rocks under the action of gravity and ofthe spring 5. It drops and falls fiat on to the upper surface of thecradle 3 (Figs. 2 to 4). Its folded portion B lies thus in the zoneswept by the sensing fingers I8 and when it meets the first of thelatter. said finger is deflected out of its normal path whereby thecorresponding pivot I9 is caused to rotate in antagonism with its spring22. This rotation is suicient for the contact piece 24 to engage one ofthe arms of the U-shaped contact piece 25, which has for its action toclose through the ground the electric circuit feeding the arrangement.

This temporary closing of the electric circuit is l made use ofby asensitive relay for actuating the electro-mechanically released meansadapted to stop the loom.

Obviously the above form of execution of the electric contact maker isillustrated only in order to disclose more clearly my invention asdescribed and illustrated, but it may obviously be of any other suitabletype.

It is also possible tol provide for a purely mecham'calstoppage-providing means; for instance,

4 other, the fallen part of the movable member I forming in this case anincurved surface imparting to said fingers a slight receding movementthrough their tips. This fallen part may also appear under the shape ofa slope which, when engaged by the fingers through its lower end,constrains them to slightly rise above their plane of rotation. c

Obviously, on the other hand, it is possible to take into account thediameter of the drum and to provide only for a single sensing nger, inwhich case the opposite end of the spring 22 is secured, to a stationarypoint, while the contact piece 25 is provided with a single contactingportion. f Lastly and in a more general sense. my inven- -tion is by nomeans limited to the sole forms of execution disclosed ,hereinabovemerely by way of example and it covers on the contrary all themodifications thereof whatever may be the manner of operating thedeflection of the sensing finger, whatever may be their mounting and themanner of making use of said deflection for causing a stoppage of theloom and also whatever may be the design of the movable member carriedby the shuttle carrier.

What I claim is:

1. In combination with a loom, the provision of means comprising ashuttle, shuttle driving means, a rotary member carried thereby forfollowing the shuttle on the outside of the shed while rolling oversame, at least one peripherally projecting sensing finger adapted toengage periodically the inside of the shed in front of the location ofthe shuttle, a movable member car-4 ried by the shuttle, means wherebythe breaking of the weft thread `produces a movement of said movablemember into engagement with the sens- -ing finger, means whereby saidengagement with side of the shedm front of the location of the shuttleduring the rotation of said rotary member, a movable member carried bythe shuttle, means whereby the breaking of the weft thread' 'produces amovement of said movable member into engagement with the sensing fingerfor shifting the latter, means associated with the sens-- ing finger andloom stopping means adapted to be operated by last mentioned means whencontrolled by the shifting of the sensing finger.

3. A weft stop motion system for circular looms comprising a shuttle, adriving member for the shuttle, a, rotary member eccentrically carriedthereby in contact with the outside of the shed for rolling in contacttherewith in the vicinity of the location of the shuttle, at least oneperipherally projecting sensing finger, a pivoting axis on said rotarymember carrying said finger, a spring urging said finger into its normalinoperative projecting position for which it engages periodically theinside of the shed in front of the location of the shuttle during therotation of said rotary member, a movable member carried by the shuttle,means whereby the breaking l of the weftthread produces a movementofsaid movable member into engagement withv the sensing nger for shiftingthe latter, an. elec4 tric switch controlled by the spring acting on theprojecting finger, loom stopping means and a comprising a shuttle, adriving member for the shuttle,- a rotary member eccentrically carriedthereby in contact with the outside of the shed for rolling in contacttherewith in the vicinity or the location of the shuttle, at least oneperipherally projecting sensing nger carried by said rotary member forengaging periodically the inside ofthe shed inl front of the location ofthe' shuttle during the rotation of said'rota'ry member, a movablemember carried by the shuttle,

means whereby the breaking of the' weft thread e produces a movement ofsaid movable member into engagement with the `sensing iinger, meansoperatively associatedwith the sensing linger loom stopping meansadapted to'be operated byl last mentioned means when controlledby the gfor rolling in contact therewith in the vicinity i of the location ofthe shuttle, at least one perlphshifting of the,sensing nnger and aremovable hood protecting the sensing finger vand :associated meansagainst the introduction ot'thread waste.

5. A weft stop motion system for circular looms shuttle during therotation of said rotary memcomprising a shuttle, a, driving member forthe shuttle, a rotary member eccentrically carried thereby in contactwith the outside or the shed for rolling in contact therewith in thevicinity oi thelocation of theshuttle, at least one peripherallyprojecting sensing Vnnger carried by said rotary member for engagingperiodically the inside of the shed in front of thelocation' of theshuttle during the rotation of said rotary member. a movable arch-shapedmember carried by the shuttle and held in its inoperative positionwhereby-the breakingot the weit thread pro-V duces 'aV movement ot saidmovable arch-shaped member into engagement'withrthe sensing linger.

.for shitting thejlatter, means operativelyv associated withv thesensing finger and loom `stop.

- ping'meansadapted tobe operated by last men` tioried` means whencontrolled bythe shittingot I 6. A wett stop motion system'rtor circularlooms comprising a shuttle. a driving member for' the shuttle. ai rotarymember eccentrically carried thereby in contact with'the outside of theshed fotrollininiintwffthtewithinthomlnyof the location ofthe shuttleratleast one peripherally projecting sensing nger carried by said rotarymember for engaging periodically the inside oi the shed in iront of thelocation of the shuttle during the rotation of said rotary member, amovable -arch-shaped member carriedby the shuttle and held in itsinoperative position' by the tension of the weft thread, a spring actingin antagonism with thetensio'n ofthe weft'thread i0 on saidarch-shapedmember for collapsing saine when the weft is broken, 'amember rigid with ,the shuttle adapted to guide the weft thread, meanswhereby thebreaking of 'theweft thread produces a movementof saidYmovable arch- 15 shaped member intoengagement-withthe sensing nger forshifting theV latter, means operatively associated with the sensing ngerand loom stop-- ping means adapted to be operated by last men- Y tionedmeans when controlled by the shifting of- Y go the sensing fingen l 7. Aweft stop motion system for circular looms comprising a shuttle, adriving member for the shuttle, a rotary member veccentrically carriedthereby in contact with the Aoutside of the shed erally projectingsensing linger carried by said rotary member Vfor engaging periodicallythe inside ofl the shed in front o! the location of the ber, a movablearch-shaped member carried by theI shuttle and heldin its inoperativeposition by the' tension of the weft thread, a spring acty ing inantagonism with the tension of the weft thread on saidv` arch-shaped.member for col'- lapsingsame when theweft is broken, an archishapedmember rigid with theV shuttle and lying in its medial plane vforguiding the weftthread and inside which the movable archshaped mem- 40ber is' adapted to collapse when the weit breaks. meanswherebythebreaking of the'weft thread Y Produces a movementVr of. saidmovable arch-I I shaped member into engagement with the sensing. -nngerforjshii'ting thejlatter.A means operativelyv "v with the sensing nngerand loom stopping means adapted to be operated by last mentioned meanswhen controlled by the shifting of vieron ANCET.

lil-:reunions errno v The following are olf-record in -the ille oi? thispatent:

t pm'mns'rarns PATENTS Number Name f :mevr

